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Finding the Fourth Proportional to 279,968.70, 418,968.90 and 195,331.80

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Solution

The fourth proportional to 279,968.70, 418,968.90 and 195,331.80 is: 292,311.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,968.70 : 418,968.90 = 195,331.80 : x
  2. Step 2: Convert to fraction form
    279,968.70/418,968.90 = 195,331.80/x
  3. Step 3: Cross multiply
    279,968.70x = 418,968.90 × 195,331.80
  4. Step 4: Simplify right side
    279,968.70x = 81,837,949,381.02
  5. Step 5: Solve for x
    x = 81,837,949,381.02/279,968.70
  6. Step 6: Final answer
    x = 292,311.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.